Morphological Control of CaCO3-Particles by a Double-hydrophilic Block Copolymer in Mixed Alcohol-water Solvents

Abstract

Abstract: The crystallization of calcite from mixed alcohol water solvents in the presence of a double hydrophilic-block-copolymer poly(ethylene glycol) block poly(methacrylic acid)(PEG-b-PMAA) has been investigated. It was revealed that with increasing the volume fractions of ethanol or isopropanol, the morphology of the CaCO₃ particles generally varies from peanuts through rods to spheres in the presence of the polymer. Specifically, uniform rounded calcite rods, which are about 2 μm in length with an aspect ratio of 2.6, were obtained in the isopropanol solution with volume fraction 50%.

Key words: Double hydrophilic block copolymer, CaCO₃ particles, Morphological control, Mixed solvents, Biomimetic synthesis

CLC Number:

O648

TrendMD:

QI Li-Min, LI Jie, MA Ji-Ming . Morphological Control of CaCO₃-Particles by a Double-hydrophilic Block Copolymer in Mixed Alcohol-water Solvents[J]. Chem. J. Chinese Universities, 2002, 23(8): 1595.

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Morphological Control of CaCO₃-Particles by a Double-hydrophilic Block Copolymer in Mixed Alcohol-water Solvents

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